Lathe dog



Dec; 8, 1925. 1,564,297

A. VALTMAN LATHE DOG Filed July 1. 1924 l mented Dec. 8, 1925,

ANTON VAL'IMAN, OF COLERAINE, MINNESOTA.

LATHE DOG.

Application filed July 1,

T all whom it may concern.

it known that I, ANTON VaL'rnaN, a citizen of the United States,residing at Coleraine, in the county of Itasca and State of Minnesota,ha e invented a new and uset'ul Lathe Dog, of which the following is aspecification.

This invention relates to lathedogs and the object thereof is to providea dog of this character having no projecting parts which are liable toengage the person or clothing of the operator and which is soconstructed and a anged that the work engaging device and its operatingmember will. lie within the body of the dog and be evenly balanced.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement ot parts and in the details oi construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed may be made within thescope of what is claimed without departing from the spirit 015 theinvention.

In the accompanying; drawings Figure 1 represents a perspective view ofa portion of a lathe showing this improved dog mounted thereon;

Fig. 2 is a longitudinal section partly in elevation through the guideopening for the work with this improved work engaging device shownmounted therein; and

Fig". 3 is a front elevation of the dog.

In the embodiment illustrated a dog;- 1 is shown, the main features ofwhich are well known. This dog comprises a body port-ion preferably madesmaller at its upper end and having projecting laterally from one facethereof a finger or bar 3 by means of which the dog may be connectedwith a retatable supporting; device such as the face plate of a latheshowi'i at %lin Fig. 1 ot the drawings. This dog 1 is provided in itslarge end with an opening 5 to receive the work shown at 6 in the form01": a rod supported at its ends by the lathe centers, the dog servingto rotate the same against a cutting tool or other implement. Ordinarilya work engaging screw is threaded into the body of the do and projectsinto the Work receiving opening 5 while the head thereot projects beyondthe edge oi the dog and is 1924. Serial No. 723,555.

liable to, and frequently does, come in contact with the person orclothing of the operator and cause injury thereto.

This invention is designed to overcome these objectionable .t'eaturesand is accomplished by forming a socket 7 in the smaller.

end of the dog havinga threaded bore 8 connecting said socket with thework receiving opening; ll iounted in the bore 8 is a threaded set screwor: bolt 10 threaded into the bore and off a length greater than thelength of the bore so that its inner end 11 will project somedistanceinto the opening 5 which end designed to engage the work 6 andplanit it secure in the opening said opening being); here shownsubstantially heart-shaped in form to provide gripping tacos :3 whichcooperate with the bolt 10 to secure the work. The head 12 Oi the boltis mounted. and housed in the socket 7 being: accessible by means of asocket wrench, not shown, for moving it toward or awa from the work tobe held.

This arrangement of the bolt 10 longitudinally in the bod; 2 of the dogprovides for the even balancing of the dog and avoids all theobjectionable features above set forth and of having auxiliary means toradjusting the bolt carried by the dog.

- The operation or the device will be readily nnoerstood from thetorepoing description and itwill be apparent that the work engagingdevice herein shown will not project beyond the outer face of the dog;at any point.

I claim A lathe don comprising: a body having a work receiving:opei'iing' therein with anL- shaped arm carried by the top thereof. onemember of said arm ext lino radially from said body and the other memberprojecting laterally to form the lathe eng "n5; finger, the radiallyextending member said arm having a socket opening through the outer endthereof with a bore connecting said socket with said opening, and awork-clamping screw threaded in said bore and having its head housed andcompletely protected within said socket, said screw and arm operating toevenly balance the dog.

In testimony that I claim the foregoing as my own, have hereto afllxedmy signature.

ANTON VALTMAN.

